Body Fat Calculator – Accurate body composition using U.S. Navy method

Summary: Body Fat Calculator uses the U.S. Navy circumference method to estimate body fat percentage more accurately than BMI. It performs all calculations locally in the browser without data collection, requiring no signup or payment.

What it does

The tool calculates body fat percentage based on circumference measurements using a science-backed method from 1984. It runs entirely in the browser with no backend, providing instant results and educational context.

Who it's for

It is designed for individuals seeking a cost-free, privacy-focused alternative to BMI and expensive scans for tracking body composition.

Why it matters

It addresses BMI’s inaccuracy by distinguishing muscle from fat, offering a practical, accessible way to monitor body fat without costly equipment.